Confused About Feeds and Galleries – Help Please

Hi,
I’m new to Wp, still building my site. I’ve read the codex, gone to various forums, but I’m still confused about how to do a couple of things. Would someone please tell me how to do the following things?

1. Feeds – My theme has an orange feed button allowing people to subscribe using LiveBookmarks, MyYahoo, Bloglines and Google. Do I need more? Should I just sign up for FeedBurner?

2. I’d like my readers submit photos of themselves. I would like to easily put those in a gallery and occasionally add them to a post. What’s the easiest way to do this?

I know these are basic questions, but I find myself more lost the more I read about them. Your help would be much appreciated.
Thanks